1. 请求: Could you please+do sth.? Could you+do sth.? Would you please+do sth.? Would you+do sth.? Can you/ May you/ Might you + ( please ) do sth? 肯定回答:Sure./Of course./No problem./I’d love to. 否定回答:Sorry./I’d love to but I… 2.委婉地提出被允许做某事: Could I please+do sth.? Could I+do sth.? Can I/ May I / Might I + do sth. 肯定回答:Sure./Of course./No problem. 否定回答:Sorry.